def ordered_product(ranges, order):
    """Iterates through ranges in the order specified in order, but each yeild returns in the original order of the ranges"""
    
    order_inv = zip(*sorted(zip(order, sorted(order))))[1]
    
    for prod in product(*(ranges[o] for o in order)):
        yield tuple(prod[o] for o in order_inv)

ranges = [[0,1], ['a','b','c'], ['w', 'x', 'y', 'z']]

print list(ordered_product(ranges, [0, 1, 2]))
print list(ordered_product(ranges, [2, 0, 1])) # this is the input with problems